System Memory (Simm) - Asus Pentium Motherboard HX97 User Manual

III. INSTALLATION

2. System Memory (SIMM)

This motherboard supports four 72-pin, 32-bit SIMMs (Single Inline Memory Mod-
ules) of 4, 8, 16, 32, or 64MB to form a memory size between 8MB to 256MB. The
SIMMs can be either 60ns or 70ns Fast Page Mode (FPM) (Asymmetric or Sym-
metric), or Enhanced Data Out (EDO) (BEDO & Parity are not supported). To
support ECC, you must use true (opposed to phantom parity generated by logic
chips) 36-bit parity-type DRAM (e.g. 8 chips + 4 parity chips) in pairs for all mod-
ules. Mixing 32-bit non-parity DRAM (e.g. 8 chips) and 36-bit DRAM (e.g. 12
chips) will work minus the ECC feature.
SIMMs must be installed in pairs so that each Row (see Map of Motherboard for Row
locations) contains 64-bits of the same size and type of memory chips. One side (with
memory chips) of the SIMM module takes up half a Row on the motherboard.
IMPORTANT: Memory speed setup is required through "Auto Configura-
tion" in BIOS Chipset Setup of the BIOS SOFTWARE. If both 60ns and 70ns
memory are used, set "Auto Configuration" to 70ns. Do not use memory mod-
ules with more than 24 chips per module. Modules with more than 24 chips
exceed the design specifications of the memory subsystem and will be unstable.
Memory Socket
SIMM Sockets 1&2
(Rows 0 & 1)
SIMM Sockets 3&4
(Rows 2 & 3)
SIMM Memory Module
4MB, 8MB, 16MB, 32MB, 64MB
72-pin FPM or EDO SIMM
4MB, 8MB, 16MB, 32MB, 64MB
72-pin FPM or EDO SIMM
Total System Memory (Max 256MB)
ASUS HX97 User's Manual
Total Memory
x2
x2
=
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